PDF malware analysis — malicious · 5084f16445fc7e7c

MALICIOUS

PDF

9.4 KB

MD5: b4f2f6224a132222f60e708eeb72e5c2 SHA-1: 820ec29611092766f9bdc14662b2991992182119 SHA-256: 5084f16445fc7e7c31edfbf57f183f9f9dabc152a94577ea913bcc66c010dadb

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). This vulnerability is known to be used for arbitrary JavaScript execution within Adobe Reader. The deobfuscated JavaScript streams indicate complex encoding and execution, typical of exploit delivery mechanisms. The primary intent appears to be the execution of further malicious code, likely a downloader or dropper, based on the heuristic firings and the nature of the exploit.

Heuristics 6

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-35905 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35905
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `d8a6b4ad1abf04d0c4a4f89535cfb57f7312edef25c443f4e844c8ec9d0929dd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	352 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `dc1b3078f79d9cc3e9d6d5685002a399861ff9d5ad010d68d0fba294c528d578`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12093 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `43157b09af56371b52028bcae12997f5d88bcc0b6de94a20e0b701d4cd13a36d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5042 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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